bd6758mwv ROHM Co. Ltd., bd6758mwv Datasheet - Page 27

• Manufacturer Part Number: bd6758mwv
• Description: 5ch System Lens Drivers For Digital Still Cameras 
• Manufacturer: ROHM Co. Ltd.

BD6758MWV and BD6758KN Function Explanation
2)
3)
1)
Power-saving function (BD6758MWV / KN)
Control input (BD6758MWV / KN)
H-bridge (BD6758MWV / KN)
brake function
Drive mode selection
(p.27/32)
Drive mode selection
(p.27/32)
Motor control input
(p.27/32)
H : EN/IN
L : IN/IN
H : EN/IN
L : IN/IN
H :
H : Brake
When Low-level voltage is applied to PS pin, the IC will be turned off internally and the circuit current will be 0μA (Typ.). During
operating mode, PS pin should be High-level. (See the Electrical Characteristics; p.6/32)
The 5-channel H-bridges can be controlled independently. For this reason, it is possible to drive the H-bridges simultaneously, as
long as the package thermal tolerances are not exceeded.
The H-bridge output transistors of BD6758MWV and BD6758KN are Power CMOS Drivers. The total H-bridge ON-Resistance on
the high and low sides varies with the VM voltage. The system must be designed so that the maximum H-bridge current for each
channel is 800mA or below. (See the Operating Conditions; p.2/32)
(1) INxA, INxB, EN1 and IN5 pins
(2) SELx pins
(3) BRKx pins
Motor control input
(p.27/32)
Motor control input
(p.27/32)
Motor control input
(p.27/32)
(p.?/32)
These pins are used to program and control the motor drive modes. (See the Electrical Characteristics; p.6/32 and I/O Truth
Table; p.28/32)
When the Low-level voltage is applied to the SEL pin, the I/O logic can be set to EN/IN mode. However, when the High-level
voltage is applied, the I/O logic can be set to IN/IN mode. (See the Electrical Characteristics; p.6/32 and I/O Truth Table;
p.28/32)
Applying the High-level voltage to the BRKx pin will set the brake mode. (See the Electrical Characteristics; p.6/32 and I/O
Truth Table; p.28/32)
Power-saving (p.27/32)
H : Active
L : Standby
resistance division value as VLIM input
value, select R
BRK1
BRK2
SEL1 28
SEL2 18
When using the VREF voltage (1.2V)
IN1A
IN1B
IN2A
IN2B
IN3A
IN3B
IN4A
IN4B
EN1 27
IN5 26
PS
2k
35
36
10
11
1
2
3
6
7
8
9
R
1
1
and R
+R
2
Power Save
Fig.50 BD6758MWV / KN Application Circuit Diagram
2
20k (p.28/32)
Logic12
Logic12
Logic34
values such that,
Logic5
Bypass filter Capacitor for
power supply input. (p.29/32)
TSD
1 100uF
VREF
Level Shift
Level Shift
Level Shift
Pre Driver
Pre Driver
Pre Driver
VREF
&
20
&
&
&
UVLO
27/32
4
R
1
VCC
19
VLIM
R
2
Const. Current
BandGap
H bridge
H bridge
H bridge
H bridge
H bridge
Full ON
Full ON
Full ON
Full ON
5
GND
31
29
30
33
34
32
14
12
13
16
17
15
24
21
25
23
22
PGND1
PGND2
VM1
OUT1A
OUT1B
OUT2A
OUT2B
VM2
OUT3A
OUT3B
OUT4A
OUT4B
VM3
OUT5A
OUT5B
RNF
SENSE
the RNF external resistor and transmitted to the
SENSE pin. (p.28/32)
The output current is converted to a voltage with
Iout[A] = VLIM[V] RNF[ ]
0.1 ~5.0
M
M
Bypass filter Capacitor for
power supply input. (p.29/32)
Bypass filter Capacitor for
power supply input. (p.29/32)
Bypass filter Capacitor for
power supply input. (p.29/32)